uxcell N.C. Recessed Wired Security Window Door Contact Sensor Alarm Magnetic Reed Switch Brown RC-33 2pcs

Price: $9.49
(as of Mar 05, 2023 13:44:21 UTC – Details)

[Dimension] – Cable Length: 26cm/10.2″; Total Size: 17mm x 10.7mm/0.67″ x 0.42″ (L*D)
[Widely Usedl] – This Recessed Door Contact Sensor works with any access control or burglar alarm system available
[Normally Closed] – N.C. means Normally Closed: When the magnet together, the circuit is conductive( light on ); when the magnet separates, the circuit is not conductive ( light off ).
[Note] – the Magnetic Door Switch must be installed according to the sensing distance. It can only provide a switch signal to the transmitter. It cannot directly load the power, nor directly connect the lamp!